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#define _POSIX_C_SOURCE 199506L
#include <math.h>
#include <stdlib.h>
#include <wayland-client.h>
#include "cairo.h"
#include "background-image.h"
#include "swaylock/swaylock.h"
#define M_PI 3.14159265358979323846
void render_frame(struct swaylock_surface *surface) {
struct swaylock_state *state = surface->state;
surface->current_buffer = get_next_buffer(state->shm,
surface->buffers,
surface->width * surface->scale,
surface->height * surface->scale);
cairo_t *cairo = surface->current_buffer->cairo;
cairo_identity_matrix(cairo);
int buffer_width = surface->width * surface->scale;
int buffer_height = surface->height * surface->scale;
if (state->args.mode == BACKGROUND_MODE_SOLID_COLOR) {
cairo_set_source_u32(cairo, state->args.color);
cairo_paint(cairo);
} else {
render_background_image(cairo, surface->image,
state->args.mode, buffer_width, buffer_height);
}
cairo_identity_matrix(cairo);
int ARC_RADIUS = 50 * surface->scale;
int ARC_THICKNESS = 10 * surface->scale;
float TYPE_INDICATOR_RANGE = M_PI / 3.0f;
float TYPE_INDICATOR_BORDER_THICKNESS = M_PI / 128.0f * surface->scale;
if (state->args.show_indicator && state->auth_state != AUTH_STATE_IDLE) {
// Draw circle
cairo_set_line_width(cairo, ARC_THICKNESS);
cairo_arc(cairo, buffer_width / 2, buffer_height / 2, ARC_RADIUS, 0, 2 * M_PI);
switch (state->auth_state) {
case AUTH_STATE_INPUT:
case AUTH_STATE_BACKSPACE: {
cairo_set_source_rgba(cairo, 0, 0, 0, 0.75);
cairo_fill_preserve(cairo);
cairo_set_source_rgb(cairo, 51.0 / 255, 125.0 / 255, 0);
cairo_stroke(cairo);
} break;
case AUTH_STATE_VALIDATING: {
cairo_set_source_rgba(cairo, 0, 114.0 / 255, 255.0 / 255, 0.75);
cairo_fill_preserve(cairo);
cairo_set_source_rgb(cairo, 51.0 / 255, 0, 250.0 / 255);
cairo_stroke(cairo);
} break;
case AUTH_STATE_INVALID: {
cairo_set_source_rgba(cairo, 250.0 / 255, 0, 0, 0.75);
cairo_fill_preserve(cairo);
cairo_set_source_rgb(cairo, 125.0 / 255, 51.0 / 255, 0);
cairo_stroke(cairo);
} break;
default: break;
}
// Draw a message
char *text = NULL;
cairo_set_source_rgb(cairo, 0, 0, 0);
cairo_select_font_face(cairo, "sans-serif",
CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cairo, ARC_RADIUS / 3.0f);
switch (state->auth_state) {
case AUTH_STATE_VALIDATING:
text = "verifying";
break;
case AUTH_STATE_INVALID:
text = "wrong";
break;
default: break;
}
if (text) {
cairo_text_extents_t extents;
double x, y;
cairo_text_extents(cairo, text, &extents);
x = (buffer_width / 2) -
(extents.width / 2 + extents.x_bearing);
y = (buffer_height / 2) -
(extents.height / 2 + extents.y_bearing);
cairo_move_to(cairo, x, y);
cairo_show_text(cairo, text);
cairo_close_path(cairo);
cairo_new_sub_path(cairo);
}
// Typing indicator: Highlight random part on keypress
if (state->auth_state == AUTH_STATE_INPUT
|| state->auth_state == AUTH_STATE_BACKSPACE) {
static double highlight_start = 0;
highlight_start +=
(rand() % (int)(M_PI * 100)) / 100.0 + M_PI * 0.5;
cairo_arc(cairo, buffer_width / 2, buffer_height / 2,
ARC_RADIUS, highlight_start,
highlight_start + TYPE_INDICATOR_RANGE);
if (state->auth_state == AUTH_STATE_INPUT) {
cairo_set_source_rgb(cairo, 51.0 / 255, 219.0 / 255, 0);
} else {
cairo_set_source_rgb(cairo, 219.0 / 255, 51.0 / 255, 0);
}
cairo_stroke(cairo);
// Draw borders
cairo_set_source_rgb(cairo, 0, 0, 0);
cairo_arc(cairo, buffer_width / 2, buffer_height / 2,
ARC_RADIUS, highlight_start,
highlight_start + TYPE_INDICATOR_BORDER_THICKNESS);
cairo_stroke(cairo);
cairo_arc(cairo, buffer_width / 2, buffer_height / 2,
ARC_RADIUS, highlight_start + TYPE_INDICATOR_RANGE,
highlight_start + TYPE_INDICATOR_RANGE +
TYPE_INDICATOR_BORDER_THICKNESS);
cairo_stroke(cairo);
}
// Draw inner + outer border of the circle
cairo_set_source_rgb(cairo, 0, 0, 0);
cairo_set_line_width(cairo, 2.0 * surface->scale);
cairo_arc(cairo, buffer_width / 2, buffer_height / 2,
ARC_RADIUS - ARC_THICKNESS / 2, 0, 2 * M_PI);
cairo_stroke(cairo);
cairo_arc(cairo, buffer_width / 2, buffer_height / 2,
ARC_RADIUS + ARC_THICKNESS / 2, 0, 2 * M_PI);
cairo_stroke(cairo);
}
wl_surface_set_buffer_scale(surface->surface, surface->scale);
wl_surface_attach(surface->surface, surface->current_buffer->buffer, 0, 0);
wl_surface_damage(surface->surface, 0, 0, buffer_width, buffer_height);
wl_surface_commit(surface->surface);
}
void render_frames(struct swaylock_state *state) {
struct swaylock_surface *surface;
wl_list_for_each(surface, &state->surfaces, link) {
render_frame(surface);
}
}
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